Safety-envelop.



J. B. DE MATTEIS.

SAFETY BNVELOP.

APPLIOATIOH run!) our. 1. 1011;.

1,1 04,1 69, Patented July 21; 1914.

Ewe hi0): #4, 7144, MM 4 44 W icence.

- To all whom it may concern is represented in the accompanying drawngs 1n which,

' State of New York, have. invented a new ing by the postagestamp.

use in interlockingthe flaps 2, 3 and 4 to- UNITED STATES IPATE JOHN 3. DE MATTEIS, OF NEW YORK, N.

Y., ASSIGNOR 0F ONE-HALF T0 SAMUEL wine, or NEW YORK, N. Y.

. SAFETY-ENVELQI'.

I Specification of Application filed October 1,

Be it known that I, J OHN B. DE MATIEIS, a citizen of theUnited. States; and resident of the borough of Manhattan, in the city and and useful Improvement in Safety-Em velops, of which the following is a specification.

The object of my invention is to provide a novel form of safety envelop with the parts so constructed and arranged that it will be impossible for the contents of the envelop to be removed without so mutilating the envelop asto make it obvious that the envelop had been tampered with.

A practical embodiment of the invention Figure l is a view looking toward the back of 'the envelop, with the parts partly closed, portions being broken away to more clearly illustrate the parts beneath the same. Fig. 2 is a front view of the envclop with the parts in the position shown in Fig. 1. Fig. 3 is a face view of the en'- vclop, showing the manner of finally seal- Fig. 4 is a section in the plane of the line A.A of Fig. 3. Fig. 5 is a section in the plane of the line B-B of Fig. 3, andFig. 6 is an inside view OI the envelop with the parts unfolded.

The envelop comprises a main rectangular portion 1, and folding flaps 2, 3, 4: and 5. The flap 5 has an inclined tongue 6,;of considerable lengtln, projecting therefrom, for

get-her and. securing them to the main portion 1, as follows: The flap 2 is provided witha tongue receiving slit 7, the fla 3 with a tongue receiving slit'S, and the ap 4: with a tongue receiving slit 9. These slits 7,, 8 and 9 register when the flaps 2, 3 and 4 are folded. The main portion 1 has a tongue receiving slit 1O therethrough, in its corner where the stamp 11 is placed.

In sealing the envelop, the flaps 2, 3 and 4,

Copies of this patent-may be obtained for are folded over the letter or other contents, not shown herein. The tongue 6 is theninserted from the exterior through the slits 7, 8 and 9, for interlocking the flaps and then outwardly through the slit 10. vThe stamp 11 is then applied in such a position that it overlaps the projecting end of the tongue 6, and thus secures the flaps to the main portion 1. The su erfluous projecting end of the flap 6, may 'hen be removed, as shown in Fig. 3.

Patented July 21, 1914:.

As a further protection for preventing the removal'of the stamp and thus permit the withdrawal of the tongue 6, as for instance, by steaming the stamp, I provide the inner face of the main portion 1, with a coating 12 of wax or other material which will discolor the exterior -of the envelop, should any attempt be made to remove the stamp 11 by heat. As a still further protcction, the flaps 2, 3,4 and 5 may be provided with gummed edges 13, 14,*15, 16, 17

What I claim is;

A safety envelop comprising a main portion having an inclined slit in one of its corners, two side flaps and one end flap having inclined slits arranged to be brought into parallelism with one' another when the flaps are folded'and the other end flap having an inclined tongue arranged to be passed inwardly through the slits in the two side and other end flaps at right angles thereto for locking the flaps together and thence; outwardly through the inclined slit five cents each, by addressing the Commissioner of Patents; Washington, D. C. a 

